Overhead supporting device for the driving shafts of gyrating machines



s. SNYDER.

SUPPORTING DEVICE FOR THE DRIVING SHAFTS 0F GYRATING MACHIN APPLICATION FILED OCT 28, 1919.

Patented Aug. 22, 1922.

f th? SIMON SNYDER, OF MUNCY, PENNSYLVANIA, ASSIGNOR TO SPBOUT,WALDRON 86 COMPANY, OF IVIUNCY, PENNSYLVANIA, A CORPORATIGN OF EENNSYLVANIA.

OVERHEAD snrronrme DEVICE FOR THE nnrvine snarrs or ernarrne MACHINES.

Specification of Letters Patent. t t A g, 22, 2

Original application filed June 28, 1918, Serial No. 242,456. Divided and this application filed. October 28, 1919. Serial No. 333,918.

T 0 all whom it may concern: v

Be it known that I, SIMON SNYDER, a citizen of the United States, residing at Muncy,

in the county of Lycoming and State of" Pennsylvania, have invented certain new and useful Improvements in Overhead Support ing Devices for, the, Driving Shafts of Gyrating Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to devices for suspending the driving shaft of gyratory machines, and more particularly to a gyratory sifter or bolting machine of the type in which the sieve structure is suspended from the ceiling or overhead support by resilient rods and to which a gyratory movement is imparted by means of a driving shaft journaled in the sieve structure; this application being a'division of my application, for an underneath controlling device for gyratory bolters, filed June 28, 1918, Serial No. 242,456, which has resulted in Patent No. 1,323,329.

The primary object ofthe invention is to provide improved means for suspending the driving shaft of a sieve or bolting machine in such manner as to permit a universal swinging or rocking and endwise movement of the suspended shaft and a gyrato-ry movement of the sieve structure and to reduce friction to a minimum.

The invention will first be hereinafter more particularly described, with reference to the accompanying drawings, which form a part of this specification, and then pointed out in the claims at the end of the description.

' In said drawings Fig. 1 is a side elevation of a gyratory bolting machine embodying my invention; t

Fig. 2 is a vertical sectional view, on an enlarged scale, of the overhead suspending device with anti-friction radial and thrust bearings and means to permit a universal or swinging movement of the shaft, and

Fig. 3 is a detail sectional view of the end thrust bearing.

Referring to said drawings, in which the same reference letters are used to denote corresponding parts in different views, the letter A may denote a gyratory machine I the bracket.

' thus securing frame or sieve structure suspended from overhead by IGSlllBIlt rods, in a well known manner, and revolublymounted' on a shaft B so as to permit rotary movement of the shaft and also movement thereof to a limited extent in the direction of its length while rotary movement is imparted thereto.

The shaft B is connected at its upper end with an eccentrically arranged section B by means of a coupling device 0, adapted to permit sllght en'dwise movement of the shaft B, and the section Bis suspended from an anti-friction bearing, preferably of the form known as theS. F, self-aligning ball bearing by which it is suspended from Said bearing consists of two concentric rings, one of which-in this instance the innerringhas annular grooves or ball races therein, each ground to a radius slightly larger than'the radius of the balls, while the other, or outer race-ring is ground in the form'of a section of a hollow sphere,

so that the balls are free to rotate at any angle with1n this spherical outer race to permit a swinging or universalv pivotal movement ofthe shaft. As shown, the'up- I per end of the shaft section is formed with a reduced extension onwhich is fitted a sleeve or collar E which is preferably formed with a reduced extension 6, on which is fitted the inner bearing ring e so, as to adapt it torest upon a shoulder formed at the base of said reduced extension, and a nut. c screwed uponthe threaded end of the shaft section clamps said inner ring and the collar E between it and said shoulder,

the radiallbearing upon the shaft in such manner thatit will partake of the endwise or longitudinal movement of the shaft, while the inner ring rotates with the shaft; the outer'ring' being relatively stationary but adapted toslide and accommodate itself to the movements of the shaft. The end thrust bearing by which the shaft section B is supported or suspended, is arranged within tubular cup-like member D of and rests upon a pendant th hanger D, and is preferably of the type known as the S. If. F. self-aligning thrust bearing consisting of upper and lower rings l1 and G, having annular grooves in their confronting surfaces and balls H therebetween running in said 'rooves. The under side of the lower ring (a, is spherical in form and seated upon a correspondingly shaped spherical surface of a base ring or washer T, whereby the desired swinging or uni-- versal pivotal movement of the shaft is permitted. Said lower ring or washer I is seated upon an inwardly extending annular flange on the lower end of the hanger aember I), through which the end of the driving shaft or shaft section B loosely extends, thus providlng sufliclent clearance between the shaft and flange to permit a swinging or rocking motion of the shaft. The hanger member D is also formed or provided with an exterior annular flange (5', which is secured to the pendant tubular portion cZ, of the hanger by belts or set screws passed through apertures in said flange and screwed into threaded holes or sockets provided therefor in'the lower end or part cl, of the hanger member D. F or the purpose of lubricating the shaft bearing and imparting rotary movement to the shaft, a pulley K on the shaft, is formed or provided with a substantially semi-globular oil cup, enclosing the pendant tubular portion of the hanger and has a hub portion 7a, which is made fast to the shaft by means of a set screw la, or other fastening device; said hub portion being provided with a, suitable stuffing box, as shown, to prevent leakage of the lubricant down the shaft; and for convenience in oiling the bearing an oil pipe L is connected through an aperture in the hanger D with a hole in the upper wall of the tubular part of the hanger, and has a compression cup 1, on its free end. The driving shaft B may be journaled in annular ball bearings within the frame structure A, and may have secured thereto an unbalanced weight or weights M, such as are ordinarily employed in gyrating sieves or bolting machines, and the coupling member between it and the upper shaft section B is preferably of substantially the same construction as the coupling member shown in a joint application of myself and one Lloyd G. VVinegardner, filed February 21, 1917, Se rial No. 150,057. The lower-end of the shaft has secured thereto an eccentric pin or shaft section B the lower end of which may be fitted in an annular thrust-limiting flange or underneath controlling device, v such as shown in my aforesaid application or the joint application above mentioned, or any of the forms ordinarily employed in this class of machines. Said controlling device is the subject of my aforesaid application, of which this applicationis a division, and no claim is made thereto herein, and no further description thereof or of the aforesaid coupling member appears to be necessary.

Having thus described my invention, what 1' claim as new and desire to secure by Letters Patent is:

l. The combination, in a gyrating bolting machine, of a driving shaft suspended from an overhead support so as to permit a swinging or universal pivotal movement thereof, said support consisting of a wall bracket or hanger having a depending tubular portion into which the shaft extends and a subjacent cup-like member secured to and closing the open end of said tubular portion, thus forming an oil chamber, and said shaft having secured thereto for suspending it within said chamber an end-thrust bearing supported on said subjacent member of said support, said thrust bearing comprising upper and lower rings or ball races with balls therebetween, the underside of the lower ring being spherical in form and seated upon a correspondingly shaped concave surface of an annular washer which in turn is seated upon the bottom of said cup-like member.

2. The combination, in a gyrating bolting machine, of a driving shaft suspended from an overhead support so as to permit a swing ing or universal pivotal movement thereof, said support consisting of a wall bracket or hanger having a depending tubular into which the shaft extends and a subjacent cup-like member secured to and closing the open end of said tubular portion, thus formmg an oil chamber, said shaft having secured thereto for suspending it within said chamber an end-thrustbearing supported on said subjacent member of said support, said thrust bearing comprising upper and lower rings or ball races with balls therebetween, the underside of the lower ring being spherical in form and seated upon the concave surface of an annular washer which rests upon the bottom of said cup-like me mber, and said shaft having a reduced end portion on which is fitted an annular radial thrust bearing composed of outer and inner rings having confronting bearing surfaces adapted to permit a swinging rocking movement of the shaft.

3. An overhead supporting device and anti-friction bearings associated therewith for suspending the driving shaft of a gymtory bolting machine so as to permit a universal rotary and swinging movement of the shaft about its axis, comprising a bracket havin a pendant tubular portion of inverted cup-like form, a subjacent cup-like bracket member secured to said tubular porportion v tion and having an opening in its bottom through which the shaft loosely extends, an annular end-thrust bearing on the shaft within said tubular portion supported upon said subjacent cup-like bracket member,

and means on the shaft pressing on and serving to confine the end-thrust bearing between said means and said subjacent cuplike bracket member; said end-thrust bearing consisting of upper and lower rings and interposed balls, and a base ring supported on saidv subjacent cup-like bracket member on which said lower ring rests, said lower rotary and swinging movement of the shaft about its axis, comprising a bracket having a pendant tubular portion of inverted cuplike form, a subj acent cup-like bracket member secured to said tubular portion and having an opening in its bottom larger than and through which the shaft extends, annular radial and end-thrust bearings on the shaft within said tubular portion supported upon said subj acent cup-like bracket member, and means on the shaft pressing on and serving to confine said bearings in separated relation between said means and said subjacent cuplike bracket member; said radial thrust bearing consisting of concentric rings and interposed balls with the outer ring slidably arranged in said tubular portion anjd'the bearing surfaces of the two rings constructed to permit both rotary and a swinging movement of the shaft and said endthrust bearing consisting of upper and lower rings and interposed balls, and a base ring supported on sai member on which under side of said lower ring being of spherd subjacent cup-like bracket said lower ring rests; the

ical form and seated upon a correspondingly,

shaped spherical surface of said base ring. In testimony whereof I afiix my signature in the presence of two witnesses. I

- SIMON SNYDER.

Witnesses:

E. C. WOODWARD, J. E. Mums. 

